Contribution of different segments of the gastrointestinal tract to digestion in growing Saanen goats
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.2527/jas.2014-8423 http://hdl.handle.net/11449/168808 |
Resumo: | This study examined mean retention time (MRT) of particulate and liquid matter in different segments of the gastrointestinal tract (GIT) of growing Saanen goats of different sexes and subjected to different levels of feed restriction. In addition, feeding behavior and total tract digestibility were determined for all animals ahead of slaughter. In total, 54 Saanen goats (18 each of females, castrated males, and intact males) with initial BW 15.3 ± 0.4 kg were used in a 3 × 3 factorial arrangement comprising the 3 sexes and 3 levels of feed restriction (unrestricted/ad libitum, moderate, and severe restriction). Six blocks per sex group, each consisting of 3 goats, were randomly formed and the goats within each block were randomly allocated to 1 of 3 different feed restrictions. The daily amounts of feed offered to animals subjected to moderate and severe feed restriction (approximately 75% and 50% of ad libitum rate, respectively) were determined within block based on the DMI by ad libitum fed goats on the previous day. The MRT of particulate matter was determined either using Yb-labeled diet or indigestible NDF (iNDF) determined in situ as markers. Mean retention time of the liquid phase was determined by Cr-EDTA. Orthogonal polynomial contrasts were used to determine linear and quadratic effect of feed restriction, while the effect of sex was compared by Tukey test. The effects of sex and the interaction between sex and feed restriction were not significant on most of variables evaluated. Eating, ruminating, and total chewing time per g DM and NDF intake increased linearly as feed restriction increased (P ≤ 0.03). Diet digestibility increased quadratically for DM and OM, and linearly for NDF as feed intake decreased (P ≤ 0.03). The MRT of iNDF in the reticulorumen, omasum, abomasum, colon, and total GIT increased linearly with increased feed restriction (P ≤ 0.01). Mean retention time in the cecum varied quadratically, being greatest for animals with moderate feed restriction. The MRT of liquid was quadratically (P ≤ 0.04) affected by feed restriction in the reticulorumen, cecum, and total GIT, with the greatest MRT observed for animals subjected to moderate feed restriction. In conclusion, the level of feed restriction increased the MRT of particulate and liquid matter. The MRT was an important mechanism to increase nutrient supply when animals were subjected to feed restriction, as indicated by increased total tract digestibility. |
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Contribution of different segments of the gastrointestinal tract to digestion in growing Saanen goatsGastrointestinal tractMarkersMean retention timePool sizeThis study examined mean retention time (MRT) of particulate and liquid matter in different segments of the gastrointestinal tract (GIT) of growing Saanen goats of different sexes and subjected to different levels of feed restriction. In addition, feeding behavior and total tract digestibility were determined for all animals ahead of slaughter. In total, 54 Saanen goats (18 each of females, castrated males, and intact males) with initial BW 15.3 ± 0.4 kg were used in a 3 × 3 factorial arrangement comprising the 3 sexes and 3 levels of feed restriction (unrestricted/ad libitum, moderate, and severe restriction). Six blocks per sex group, each consisting of 3 goats, were randomly formed and the goats within each block were randomly allocated to 1 of 3 different feed restrictions. The daily amounts of feed offered to animals subjected to moderate and severe feed restriction (approximately 75% and 50% of ad libitum rate, respectively) were determined within block based on the DMI by ad libitum fed goats on the previous day. The MRT of particulate matter was determined either using Yb-labeled diet or indigestible NDF (iNDF) determined in situ as markers. Mean retention time of the liquid phase was determined by Cr-EDTA. Orthogonal polynomial contrasts were used to determine linear and quadratic effect of feed restriction, while the effect of sex was compared by Tukey test. The effects of sex and the interaction between sex and feed restriction were not significant on most of variables evaluated. Eating, ruminating, and total chewing time per g DM and NDF intake increased linearly as feed restriction increased (P ≤ 0.03). Diet digestibility increased quadratically for DM and OM, and linearly for NDF as feed intake decreased (P ≤ 0.03). The MRT of iNDF in the reticulorumen, omasum, abomasum, colon, and total GIT increased linearly with increased feed restriction (P ≤ 0.01). Mean retention time in the cecum varied quadratically, being greatest for animals with moderate feed restriction. The MRT of liquid was quadratically (P ≤ 0.04) affected by feed restriction in the reticulorumen, cecum, and total GIT, with the greatest MRT observed for animals subjected to moderate feed restriction. In conclusion, the level of feed restriction increased the MRT of particulate and liquid matter. The MRT was an important mechanism to increase nutrient supply when animals were subjected to feed restriction, as indicated by increased total tract digestibility.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Department of Animal Science Universidade Estadual Paulista (Unesp), Via de Acesso Prof Paulo Donato Castellane s/nDepartment of Agricultural Research for Northern Sweden Swedish University of Agricultural SciencesDepartment of Animal Science Universidade Estadual Paulista (Unesp), Via de Acesso Prof Paulo Donato Castellane s/nFAPESP: 2008/57302-0FAPESP: 2010/20087-5FAPESP: 2013/06259-6Universidade Estadual Paulista (Unesp)Swedish University of Agricultural SciencesLeite, R. F. [UNESP]Krizsan, S. J.Figueiredo, F. O.M. [UNESP]Carvalho, V. B. [UNESP]Teixeira, I. A.M.A. [UNESP]Huhtanen, P.2018-12-11T16:43:10Z2018-12-11T16:43:10Z2015-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1802-1814application/pdfhttp://dx.doi.org/10.2527/jas.2014-8423Journal of Animal Science, v. 93, n. 4, p. 1802-1814, 2015.1525-31630021-8812http://hdl.handle.net/11449/16880810.2527/jas.2014-84232-s2.0-849784060292-s2.0-84978406029.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Animal Science0,848info:eu-repo/semantics/openAccess2023-10-11T06:02:52Zoai:repositorio.unesp.br:11449/168808Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-11T06:02:52Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Contribution of different segments of the gastrointestinal tract to digestion in growing Saanen goats |
title |
Contribution of different segments of the gastrointestinal tract to digestion in growing Saanen goats |
spellingShingle |
Contribution of different segments of the gastrointestinal tract to digestion in growing Saanen goats Leite, R. F. [UNESP] Gastrointestinal tract Markers Mean retention time Pool size |
title_short |
Contribution of different segments of the gastrointestinal tract to digestion in growing Saanen goats |
title_full |
Contribution of different segments of the gastrointestinal tract to digestion in growing Saanen goats |
title_fullStr |
Contribution of different segments of the gastrointestinal tract to digestion in growing Saanen goats |
title_full_unstemmed |
Contribution of different segments of the gastrointestinal tract to digestion in growing Saanen goats |
title_sort |
Contribution of different segments of the gastrointestinal tract to digestion in growing Saanen goats |
author |
Leite, R. F. [UNESP] |
author_facet |
Leite, R. F. [UNESP] Krizsan, S. J. Figueiredo, F. O.M. [UNESP] Carvalho, V. B. [UNESP] Teixeira, I. A.M.A. [UNESP] Huhtanen, P. |
author_role |
author |
author2 |
Krizsan, S. J. Figueiredo, F. O.M. [UNESP] Carvalho, V. B. [UNESP] Teixeira, I. A.M.A. [UNESP] Huhtanen, P. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Swedish University of Agricultural Sciences |
dc.contributor.author.fl_str_mv |
Leite, R. F. [UNESP] Krizsan, S. J. Figueiredo, F. O.M. [UNESP] Carvalho, V. B. [UNESP] Teixeira, I. A.M.A. [UNESP] Huhtanen, P. |
dc.subject.por.fl_str_mv |
Gastrointestinal tract Markers Mean retention time Pool size |
topic |
Gastrointestinal tract Markers Mean retention time Pool size |
description |
This study examined mean retention time (MRT) of particulate and liquid matter in different segments of the gastrointestinal tract (GIT) of growing Saanen goats of different sexes and subjected to different levels of feed restriction. In addition, feeding behavior and total tract digestibility were determined for all animals ahead of slaughter. In total, 54 Saanen goats (18 each of females, castrated males, and intact males) with initial BW 15.3 ± 0.4 kg were used in a 3 × 3 factorial arrangement comprising the 3 sexes and 3 levels of feed restriction (unrestricted/ad libitum, moderate, and severe restriction). Six blocks per sex group, each consisting of 3 goats, were randomly formed and the goats within each block were randomly allocated to 1 of 3 different feed restrictions. The daily amounts of feed offered to animals subjected to moderate and severe feed restriction (approximately 75% and 50% of ad libitum rate, respectively) were determined within block based on the DMI by ad libitum fed goats on the previous day. The MRT of particulate matter was determined either using Yb-labeled diet or indigestible NDF (iNDF) determined in situ as markers. Mean retention time of the liquid phase was determined by Cr-EDTA. Orthogonal polynomial contrasts were used to determine linear and quadratic effect of feed restriction, while the effect of sex was compared by Tukey test. The effects of sex and the interaction between sex and feed restriction were not significant on most of variables evaluated. Eating, ruminating, and total chewing time per g DM and NDF intake increased linearly as feed restriction increased (P ≤ 0.03). Diet digestibility increased quadratically for DM and OM, and linearly for NDF as feed intake decreased (P ≤ 0.03). The MRT of iNDF in the reticulorumen, omasum, abomasum, colon, and total GIT increased linearly with increased feed restriction (P ≤ 0.01). Mean retention time in the cecum varied quadratically, being greatest for animals with moderate feed restriction. The MRT of liquid was quadratically (P ≤ 0.04) affected by feed restriction in the reticulorumen, cecum, and total GIT, with the greatest MRT observed for animals subjected to moderate feed restriction. In conclusion, the level of feed restriction increased the MRT of particulate and liquid matter. The MRT was an important mechanism to increase nutrient supply when animals were subjected to feed restriction, as indicated by increased total tract digestibility. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-04-01 2018-12-11T16:43:10Z 2018-12-11T16:43:10Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.2527/jas.2014-8423 Journal of Animal Science, v. 93, n. 4, p. 1802-1814, 2015. 1525-3163 0021-8812 http://hdl.handle.net/11449/168808 10.2527/jas.2014-8423 2-s2.0-84978406029 2-s2.0-84978406029.pdf |
url |
http://dx.doi.org/10.2527/jas.2014-8423 http://hdl.handle.net/11449/168808 |
identifier_str_mv |
Journal of Animal Science, v. 93, n. 4, p. 1802-1814, 2015. 1525-3163 0021-8812 10.2527/jas.2014-8423 2-s2.0-84978406029 2-s2.0-84978406029.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Animal Science 0,848 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1802-1814 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799964515868082176 |